Railway-traffic-controlling system



Aug. 17 1926.

G. C. WHITNEY RAILWAY TRAFFIC CONTROLLING SYSTEM Original Filed March 5,1924 m M w W .Q Q n...ll||.|| m w QN km kv .3 1 3w 8 9v 2; 2? Nu n u m\S FIIMWIIIL v Q v km uxm wm ll m Patented Aug. 1?, 192a curries staresGILBERT G. WHITNEY, OF NEW YORK, N. Y.

RAILVJAY -TRAFFIG-CONTROLLING SYSTEM.

Original application filed March 5, 1924, Serial No. 697,129. Dividedand this application filed September This invention relates to railwaytraffic controlling systems in general wherein means are provided forthe control of trains by signals and in particular to means forcontrolling said signals by the novel means of controlling the trackrelay of the track circuit from a remote location and retainingindication as to its operation.

This present application is a division of my co-pending applicationfiled March 5, 1924, Serial No. 697,129 for railway traffic controllingsystem.

The accompanying drawing is a View showing one form of railway trafiiccontrolling apparatus having incorporated therewith one form of controlwhich characterizes my invention.

Referring to the drawing, a track section is set apart by insulatedjoints 8 the track rails of the section being identified by thereference characters 6 and 7. At one end of said track section atransformer 9 is shown connected to rails 6, 7, by means of track wires10, 11, resistance 12 and fuse 13. Transformer 9 is the medium, whenenergized via wires 14, 15, from power wires 16, 17, connected to thesource of energy, alternator 18, by which appropriate current supply,when a train is not present, is transmitted over said track rails totrack wires 19, fuse 21 and resistance 22 to winding 23 of relay 24./Vinding 25 of relay 24 receives energy via wires 26, 27, from powerwires 16, 17, and thus far the whole constitutes the well-knownalternating track circuit wherein most of the energy required for theoperation of the track relay 24 is supplied locally and only a smallpart or activating current is transmitted over the track rails. Also inconventional manner I have shown signal 3233 controlled by contact 28 ofrelay 24 and control wires 29, 30 and 31. The track and circuit andsignal and circuit outlined above is intended simply as a structure andI make no claims of invention in connection therewith.

My invention consists in connecting the winding of transformer 34 inseries in the track circuit (here shown in multiple with resistance 22)so that a part of the current flowing to winding 23 of relay 24 passesthrough said winding 35. Inductively coupled to winding 35 is shownwinding 36 and the current induced therein is carried over transmissionwires 37, 38, to the de- Serial n. 735,584.

spatchers quarters and there energizes winding 40 of transformer 39 viawire 43 and despatchers multiple point control switch 44.

Inductively coupled to winding 40 is shown -with respect tooccupancy andnon-occupancy, of the track section.

Associated with control switch 44 I have shown a resistance 46 which Iuse to provide despatchers control of signal 32-33-and at the same timeretain track section indication. To control signal 3233 the despatchermoves switch out of engagement as shown and into position to contact47this inserts resistance 46 into the transmission circuit included withwires 37-, 38, and less current flows therein resulting in lower inducedcurrent supply to lamp As a result of increasing the resistance of thetransmission circuit the impedance of winding 36 is increased whichautomatically is refiected in increased impedance in winding 35 and asthis winding is in series in the circuit supplying current to winding 23a lowered current supply to winding 23 of relay 24'is effected and therelay opens and with the opening of the relay contact 23 a change in theindication of signal 32 -33 results as will be appreciated.

Important features of this invention are that the despatc'hers controlof the signal is introduced at the relay end of the track circuit andtherefore does not interfere with whatever use may be desired to be madeof the track circuit energy from the transformer 9 end of the tracksection by a train on the track rails 6, 7. Also that track sectionindication as to non-occupancy is evidenced by a lighted indicator lamp.

Obviously,various types of track circuits, both alternating and directcurrent, of single and double rail types may be employed in combinationwith my invention by making the obvious appropriate changes wellknown toany one ordinarily skilled in this art and I desire to have itunderstood, therefore, that the foregoing illustration and descriptiondoes not exhaust the various embodiments and forms which my inventionmay take in practice.

Having thus described my invention 1 claim and desire to secure-byLetters Patcut:

1. In a railway trailic controlling system, a track circuit including arelay and a source of energy, a block signal and system controlled bysaid track relay, a second signal and indication system inductivelycoupled to said track circuit and receiving operating energy therefromwhen the track circuit is not occupied by a train and with reducedoperating energy when the track circuit is occupied by a train, saidsystems acting independently of each other.

2. The invention set forth in claim 1 with a remotely locateddespatchefis control means included in theinductively coupled system forcontrolling the block signal system by control of the current receivedfrom the track rails.

3. In a railway traffic controlling system,

a track circuit including a winding of a two winding relay and a sourceof energy, the other winding of said relay receiving energy direct fromsaid source, the primary winding of a transformer included in series inthe relay connection to the track rails of the track circuit, thesecondary winding of aid transformer included in a circuit containing adespatchers control switch. 4. The invention set forth in claim 3 withan indicating device inductively coupled with the circuit containing thedespatchers control. switch.

5. The invention set forth in claim 3 with an indicating deviceinductively coupled with the circuit containing the despatchers controlswitch and adapted to indicate when the track circuit is not occupied bya train.

6. The invention set forth in claim 3 with an indicating deviceinductively coupled with the circuit con aining the despatcher s controlswitch and adapted to indicate when the track circuit is not occupied bya train, said indicating device also adapted to inclicate reduced energysupply to the track relay when the track circuit is not occupied by atrain and the despatchers control switch has'been operated, said trackrelay controlling an automaticblock signal system for governing trainmovements over said track circuit.

7. In a railway traffic controlling system, an alternatingcurrent trackcircuit including a source of energy and one winding of a twowindingtrack relay, said source of energy applied to the track circuitat one end of an insulated track rail section and said 'in'dingconnected to the insulated track rail section at the other end, theother wind- -1 receiving energy direct from said source, and anindicator-lamp connected in series with the first mentioned windingbetween said winding and said insulated track rail section.

8, In a railway traffic control-ling system, an alternating currenttrack circuit including a source of energy .a-nda track relay, saidsource of energy applied to the-track circuit at one end of an insulatedtrack rail section and the relay connected to the insulated track railsection at the other end, and means including an indicator lampinductively cou pled in series with the track relay connection to trackrails.

9. The invention set forth in clai1n7 with said indicator lampinductively coupled to the track circuit between said winding and saidinsulated track rail. section.

10. The invention set forth in claim 7 with said indicator lampinductively coupled to the track circuit'between said winding and saidinsulated track rail section, said track relay controlling an automaticblock signal system for governing train movements over said trackcircuit.

Signed at New York-in the county of New York and State of New York this2nd day of eptember, A. D. 1924.

GILBERT C. WHITNEY.

